How do anxiety and fear alter our perception of time?

How does the paper conceptually distinguish fear from anxiety in terms of threat characteristics?

Fear is an acute aversive state triggered by an immediate and certain threat, whereas anxiety is a prolonged, future-oriented aversive state elicited by an uncertain threat.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What is the primary hypothesis of this study regarding the effect of anxiety on time perception?

The researchers hypothesized that anxiety, unlike fear, would result in the underestimation of time intervals.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

According to the attentional model of time perception, why does fear theoretically lead to time overestimation?

Fear focuses attention on timing the immediate, present threat, which is adaptive for survival and leads to overestimating the duration of the event.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

How is the temporal bisection task used to measure subjective time perception in this study?

Participants are trained on a 'short' and a 'long' anchor duration and must classify intermediate probe durations as closer to one of these two anchors.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What does the Bisection Point (BP) represent in psychophysical modeling of time perception?

The BP is the specific interval duration perceived as exactly halfway between the short and long anchors, where the probability of responding 'long' is 50%.

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What does a rightward shift of the temporal bisection curve indicate about time perception?

A rightward shift results in a larger Bisection Point, indicating that a longer objective duration is required to reach the 50% threshold, meaning time is underestimated.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What aspect of time perception does the Weber Fraction (WF) measure?

The WF measures temporal sensitivity or precision in sensory discrimination, where a lower fraction indicates greater sensitivity to small differences in duration.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

Why did the researchers test both subsecond (Exp 1) and suprasecond (Exp 2) durations?

They wanted to ensure generalizability because different neurocognitive mechanisms are believed to underlie subsecond versus suprasecond timing.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What was the purpose of Experiment 3 in the study's overall design?

Experiment 3 sought to test if the time underestimation effect observed in Experiments 1 and 2 was driven by threat anticipation (anxiety) rather than the physical delivery of shocks.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What did Experiment 1 find regarding the effect of anxiety on subsecond time intervals?

Anxiety significantly underestimated subsecond intervals, as reflected by a larger Bisection Point (rightward shift) during threat blocks compared to safe blocks.

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What did Experiment 2 show about the effect of anxiety on suprasecond time perception?

It replicated the findings of Experiment 1, showing that anxiety leads to temporal underestimation (increased Bisection Point) even for suprasecond durations.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What key finding from Experiment 3 clarified the role of actual shock delivery in time underestimation?

Time was still significantly underestimated under threat even when no shocks were actually delivered, indicating anticipation alone drives the effect.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What did the combined exploratory analysis of Experiments 1-3 reveal about the effect of the stimuli's emotional expressions?

The emotional facial expression of the stimulus (happy, fearful, neutral) had no significant effect on time perception.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

How did the fear manipulation in Experiments 4 and 5 differ from the anxiety manipulation in Experiments 1-3?

In the fear experiments, shocks were 100% predictable based on visual cues (fractal colors) and delivered immediately upon stimulus disappearance, whereas in the anxiety task, shocks were unpredictable and occurred during the inter-trial intervals.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What were the primary outcomes of the fear experiments (Experiments 4 & 5)?

The fear manipulation did not produce a statistically significant effect on time perception, failing to demonstrate robust temporal overestimation.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What was the meta-analytic effect size for the Bisection Point under the anxiety manipulation across Studies 1-3?

The meta-analysis revealed a moderate-to-large effect size of d = 0.67, confirming that anxiety consistently led to temporal underestimation.

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Did the meta-analysis find a robust effect of anxiety on temporal sensitivity (Weber Fraction)?

The meta-analysis found a very small (d = 0.24) and barely significant effect, suggesting that anxiety does not strongly affect temporal sensitivity.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What attentional mechanism is proposed to explain why anxiety causes time to be underestimated?

Anxiety shifts attention away from the current timing task and toward anticipating future, uncertain negative outcomes, which causes the internal clock to 'miss ticks.'

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

Why did the authors argue that an arousal-based model cannot account for their anxiety results?

Arousal typically speeds up the internal clock leading to time overestimation, but the study observed time underestimation under anxiety, pointing to an attentional distraction mechanism instead.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

Why might the study have failed to replicate prior findings of fear-induced time overestimation?

In prior studies, shocks occurred while the stimulus was on screen, whereas this study delivered shocks after the stimulus disappeared, meaning previous overestimations might have reflected recovery from actual pain.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What limitation of the fear conditioning trials (Experiments 4 & 5) could have led to the null fear results?

Shocks were delivered on 100% of fear trials, which may have led to rapid sensory habituation, weakening the psychological impact of the fear manipulation.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

How did the authors suggest future studies could optimize the fear paradigm to prevent habituation?

They suggested reducing the shock reinforcement rate to 60%, matching standard protocols in fear conditioning literature.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What limitation regarding stimulus generalizability did the authors identify for Experiments 1-3?

They used emotional faces as timing stimuli, leaving open the question of whether anxiety-induced underestimation generalizes to neutral, non-face stimuli.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What are the clinical implications of these findings for specific psychiatric disorders?

Generalized anxiety disorder may be associated with the feeling that time flies due to future threat anticipation, whereas PTSD and specific phobias may involve the feeling that time slows down during acute fear states.

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What calibration method was used to establish the physical shock intensity for each participant?

A shock work-up was conducted where participants rated shock step increases across three runs; the intensity rated as an '8' (approaching maximum tolerated) in the final run was selected.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

How did block progression impact the effect of anxiety on time perception in Experiment 1?

Anxiety significantly caused time underestimation during the first twelve blocks, but this effect disappeared in the final six blocks of the experiment.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

How did block progression in Experiment 2 (suprasecond) differ from Experiment 1 (subsecond)?

In Experiment 2, the underestimation effect did not decay over time; temporal perception changed across blocks regardless of the threat condition, maintaining the overall threat effect.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

Why did the authors think that emotional faces failed to affect time perception, contrary to previous literature?

The overarching context of anxiety (anticipating shocks) might have swamped the subtler emotional impact of happy or fearful faces, or induced an egocentric mindset.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What anchor durations were used to train participants on the subsecond bisection task in Experiment 1?

The short anchor duration was 300 ms, and the long anchor duration was 700 ms.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What anchor durations were used to train participants on the suprasecond bisection tasks in Experiments 2 and 3?

The short anchor duration was 1,400 ms, and the long anchor duration was 2,600 ms.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

How did the visual display signal the threat versus safe condition blocks to the participants?

The timing task was surrounded by colored borders (red, blue, green, or magenta) indicating whether the current block was safe or threat-of-shock.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

How did the authors rule out the physical sensation of pain as the driver of time underestimation in Experiments 1 & 2?

In Experiment 3, participants underwent the threat-of-shock anticipation paradigm and still underestimated time, despite receiving zero actual physical shocks during the task.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

How does anxiety-induced egocentrism theoretically explain the null effect of face emotions on time perception?

Anxiety is known to trigger an egocentric mindset when inferring others' feelings, making participants less sensitive or responsive to the emotional expressions of the faces they observed.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

How do 'oddball paradigms' support the attentional account of temporal overestimation?

A novel or surprising 'oddball' stimulus automatically captures attention, which increases timing resources and consistently causes participants to overestimate its duration.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified

What limitation of the operationalization of anxiety in this study was noted regarding real-world anxiety?

The study framed anxiety as a response to a predictable but temporally unpredictable physical threat (shocks), whereas clinical anxiety often involves completely unknown or imagined future threats.

Source: Anxiety makes time pass quicker while fear has no effect · DOI · quote verified